Energy levels and their correlations in quasicrystals

Details Energy levels and their correlations in quasicrystals Energy levels and their correlations in quasicrystals

2006-11-03

arxiv.org/abs/cond-mat/0611081v1

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages including 19 figures. Review article, submitted to Phil. Mag

Scientific paper

10.1080/14786430701196990

Quasicrystals can be considered, from the point of view of their electronic properties, as being intermediate between metals and insulators. For example, experiments show that quasicrystalline alloys such as AlCuFe or AlPdMn have conductivities far smaller than those of the metals that these alloys are composed from. Wave functions in a quasicrystal are typically intermediate in character between the extended states of a crystal and the exponentially localized states in the insulating phase, and this is also reflected in the energy spectrum and the density of states. In the theoretical studies we consider in this review, the quasicrystals are described by a pure hopping tight binding model on simple tilings. We focus on spectral properties, which we compare with those of other complex systems, in particular, the Anderson model of a disordered metal.

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